They were so named by the Southern Party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE) (1963–64) because of the prevalence of gabbro, a dark, plutonic rock, in the area.

A steep, narrow snow pass between the south end of Gabbro Hills and Mount Llano, permitting passage between the Barrett and Gough Glaciers.

The highest peak in the Gabbro Hills, 1,660 metres (5,450 ft) high, standing 4 nautical miles (7.4 km; 4.6 mi) north of Mount Llano.

A mountain, 1,480 metres (4,860 ft) high, in the southeast part of Gabbro Hills near the edge of the Ross Ice Shelf, standing at the west side of Gough Glacier, 6 nautical miles (11 km; 6.9 mi) east of Amphibole Peak.

A rock peak 870 metres (2,850 ft) high located 3 nautical miles (5.6 km; 3.5 mi) east of Mount Justman in the northeast corner of Gabbro Hills, near the edge of the Ross Ice Shelf.

A mountain 740 metres (2,430 ft) high along the edge of Ross Ice Shelf, standing in the north part of Gabbro Hills, midway between Olliver Peak and Mount Roth.

Two ice-free nunataks, 1 nautical mile (1.9 km; 1.2 mi) apart, located at the edge of the Ross Ice Shelf just north of Mount Justman and the Gabbro Hills.